The diminished inflation outlook has helped fueled Treasury bond ETF bets. For instance, over the past two weeks, TLT has saw $342.6 million in net inflows and ZROZ attracted $49.8 million in inflows, according to

Meanwhile, the ProShares Short 20+ Year Treasury (NYSEArca: TBF), which aims to deliver the daily inverse performance of the Barclays Capital 20+ Year U.S. Treasury Bond Index, saw $17.1 million in outflows over the past two weeks.

iShares 20+ Year Treasury Bond ETF

For more information on the Treasuries market, visit our Treasury bonds category.

Max Chen contributed to this article.